| package org.eclipse.swt.dnd; |
| |
| /* |
| * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. |
| * This file is made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| */ |
| |
| import org.eclipse.swt.internal.gtk.OS; |
| |
| /** |
| * The class <code>ByteArrayTransfer</code> provides a platform specific |
| * mechanism for converting a java <code>byte[]</code> to a platform |
| * specific representation of the byte array and vice versa. See |
| * <code>Transfer</code> for additional information. |
| * |
| * <p><code>ByteArrayTransfer</code> is never used directly but is sub-classed |
| * by transfer agents that convert between data in a java format such as a |
| * <code>String</code> and a platform specific byte array. |
| * |
| * <p>If the data you are converting <b>does not</b> map to a |
| * <code>byte[]</code>, you should sub-class <code>Transfer</code> directly |
| * and do your own mapping to a platform data type.</p> |
| */ |
| public abstract class ByteArrayTransfer extends Transfer { |
| |
| public TransferData[] getSupportedTypes(){ |
| int[] types = getTypeIds(); |
| TransferData[] data = new TransferData[types.length]; |
| for (int i = 0; i < types.length; i++) { |
| data[i] = new TransferData(); |
| data[i].type = types[i]; |
| } |
| return data; |
| } |
| |
| public boolean isSupportedType(TransferData transferData){ |
| if ( transferData == null ) return false; |
| int[] types = getTypeIds(); |
| for (int i = 0; i < types.length; i++) { |
| if (transferData.type == types[i]) return true; |
| } |
| return false; |
| } |
| |
| protected void javaToNative (Object object, TransferData transferData){ |
| if ((object == null) || !(object instanceof byte[]) || !(isSupportedType(transferData))) { |
| transferData.result = 0; |
| return; |
| } |
| byte[] buffer = (byte[])object; |
| transferData.pValue = OS.g_malloc(buffer.length); |
| OS.memmove(transferData.pValue, buffer, buffer.length); |
| transferData.length = buffer.length; |
| transferData.format = 8; |
| transferData.result = 1; |
| } |
| |
| protected Object nativeToJava(TransferData transferData){ |
| if ( !isSupportedType(transferData) || transferData.pValue == 0 ) return null; |
| int size = transferData.format * transferData.length / 8; |
| byte[] buffer = new byte[size]; |
| OS.memmove(buffer, transferData.pValue, size); |
| return buffer; |
| } |
| |
| } |